Hydronic Tanks

Backstop® H Series Hydronic Expansion Tanks are diaphragm type tanks designed to keep system pressure below relief valve settings. They absorb the expansion of water in residential or commercial hydronic (forced hot water) heating systems.

Model No.	Volume (gal)	Height	Diameter	Sys. Conn.	Ship Wt. (lbs.)
12-H15	2.1	12-1/2”	8”	1/2”	4.25
12-H30	4.5	15”	11”	1/2”	7.5
12-H60	6	16-5/8”	11-1/2”	1/2”	8.75
12-H90	14	23-1/2”	15-1/2”	1/2”	19
12-H120	20	30-1/2″	15-1/2”	1″	31
12-HX60	27	29″	20″	1″	48
12-HX90	40	37″	20″	1″	63
12-HX100	53	40″	24″	1-1/4″	80
12-HX110	66	46″	26″	1-1/4″	90
12-HX160	80	48″	26″	1-1/4″	112

Net output in 100’s of BTU per Hour	Finned Tube Baseboards or Radiant Panels	Convectors or Unit Heaters	Cast Iron Radiators	Cast Iron Baseboards
25	H-15	H-15	H-15	H-15
50	H-15	H-15	H-30	H-30
75	H-30	H-30	H-30	H-60
100	H-30	H-30	H-60	H-60
125	H-30	H-60	H-60	H-90
150	H-30	H-60	H-90	H-90
175	H-60	H-60	H-90	H-90
200	H-60	H-60	H-90	H-90
250	H-60	H-90	H-90	CALL
300	H-90	H-90	H-90	CALL
350	H-90	H-90	CALL	CALL
400	H-90	CALL	CALL	CALL

System Content	100	110	120	130	140	150	160	170	180	190	200	210	220	230	240
25	H-15	H-15	H-15	H-15	H-15	H-15	H-15	H-15	H-15	H-15	H-30	H-30	H-30	H-30	H-30
50	H-15	H-15	H-15	H-15	H-15	H-30	H-30	H-30	H-30	H-30	H-30	H-60	H-60	H-60	H-60
75	H-15	H-15	H-15	H-30	H-30	H-30	H-30	H-30	H-60	H-60	H-60	H-90	H-90	H-90	H-90
100	H-15	H-15	H-30	H-30	H-30	H-30	H-60	H-60	H-90	H-90	H-90	H-90	H-90	H-90	H-90
200	H-30	H-30	H-30	H-60	H-60	H-60	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL
300	H-30	H-60	H-90	H-90	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
400	H-60	H-90	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
500	H-90	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
600	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
700	H-90	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
800	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL
900	H-90	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL	CALL

H SERIES

Gal.	BackStop©	Amtrol	B&G	ELBI	Flexcon	Sparco	State	Watts	Wessels	Wilkins
2.1	H15	15	HFT-15	XT-15	VR15F	TK-300-15	ET-2	ET-15	N-15	HXT-15
4.8	H30	30	HFT-30	XT-30	VR30F	TK-300-30	ET-5	ET-30	N-30	HXT-30
6	H60	60	HFT-60	XT-60	VR60F	TK-300-60	ET-7	ET-60	N-60	HXT-60
14	H90	90	HFT-90	XT-90	VR90F	TK-300-90	ET-12	ET-90	N-90	HXT-90